Spheroidizing treater

The technology of spheroidizing treatment and spheroidizing agent is applied in the production process field of rare earth magnesium iron ferrosilicon spheroidizing agent flushing into the bag, which can solve the problems of low absorption rate of effective elements and violent reaction, and achieves the production environment. The effect of improving and eliminating environmental pollution and less liquid slag

Inactive Publication Date: 2010-12-22
河北贝广电力设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of violent reaction and low absorption rate of effective elements during the spheroidization process of flushing into the bag, stabilize and improve product quality, reduce production cost and achieve energy recycling

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] It is carried out under the smelting conditions of the cold air cupola, the melting rate is 2 tons / hour, and the attached figure 1 The spheroidizing treatment device shown adopts embankment-type molten iron ladle, and the weight of molten iron per ladle is 500kg. The red hot ladle is used for continuous operation. The support rod pressure head 1 is circular. The amount of sulfur is 0.036%, the addition of the melted nodulizer containing Mg15%, RE1.5% and Si53% is 1.1%, the addition of 0.3% to the 72SiFe inoculant bag, the addition of 0.2% to the secondary silicon barium inoculation, the reaction start time After 30 seconds of tapping the molten iron, when the spheroidizing reaction time is controlled to be more than 100 seconds, it is a boiling reaction of molten iron without magnesium light. The sample is taken 9 minutes after the spheroidizing reaction, the spheroidizing level is 2, the tensile strength is 487Mpa, and the elongation is 21. %.

Embodiment 2

[0018] Carried out under cold air cupola smelting conditions, the melting rate is 5 tons / hour, and the attached figure 1 The spheroidizing treatment device shown adopts embankment-type molten iron ladles. The weight of molten iron per ladle is 1100kg. The red hot ladle is used for 8 hours of continuous operation. According to the different wall thickness of castings, use Mg16%, RE3% and Si58% melted spheroidizers to break down to a particle size of <50mm. The amount of silicon barium inoculation added is 0.2%. After the molten iron is poured into the ladle for 60 seconds, the spheroidization reaction starts. When the reaction time is more than 2 minutes and 30 seconds, it is a magnesium-free molten iron boiling reaction. When the reaction time is 1 minute and 30 seconds Magnesium appeared, but the intensity of magnesium light was significantly lower than that produced by traditional spheroidization reaction, and there was no molten iron splashing phenomenon. The sample was tak...

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Abstract

A spheroidizing treater for producing spheroidal graphite cast iron is carried out by adjusting bearing rod head and dam seam and controlling iron-water and nodulizer contact. It adopts waste-heat one-step method and controls spheroidizing reactive time and strength; the spheroidizing agent consists of Mg<=20%, RE<=3% and Si<=65%. It's simple, cheap and can be used for large-scale continuous production.

Description

technical field [0001] The invention is a spheroidizing treatment device for producing nodular cast iron, more specifically a production process of spheroidizing treatment by using a rare earth magnesium ferrosilicon spheroidizing agent to rush into a bag. Background technique [0002] In the production of ductile iron castings, the production process of spheroidizing by flushing into the ladle is generally adopted. During the spheroidization treatment by the method of flushing into the ladle, rare earth magnesium-silicon-iron alloys are widely used as spheroidizers. The spheroidizing treatment by flushing into the ladle is easy to operate, and the molten iron does not need to be poured after the spheroidizing treatment to reduce the temperature. For a long time, counterparts at home and abroad have made unremitting efforts to study the spheroidizing treatment technology of flushing into the bag and the production process of rare earth magnesium ferrosilicon spheroidizer. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C33/10
Inventor 刘年路
Owner 河北贝广电力设备有限公司
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